Water-supply system and valve therefor



May 7, 19x29.

E. o. HAMREN 1,712,224

WATER SUPPLY-SYSTEM AND VALVE THEREFOR Filed oct. 25, 192e 4 Sheets-sheet 1 31m/nemica May 7, 1929- E. o. HAMREN -WATER SUPPLY SYSTEM AND VALVE THEEFOR 4 Sheets-Sheet 2 Filed` Oct. 25, 1926 May 7, 1929. E. o. HAMREN 1,712,224

WATER SUPPLY SYSTEM AND VALVE`THEREFOR Filed om. 25, 192e 4 sheets-sheet 3 May 7, 1929. l E. o. HAMREN 1,712,224

WATER SUPPLY SYSTEM AND VALVE THEREFOR Filed Oct. 25, 1926 4 Sheets-Sheet 4 4 nfum Motrarement May r, 1929.

'-UNlTEDf STATES 1,112,224 PATENT OFFICE.

ERIC 0. HAMREN, F MILWAUKEE, WISCONSIN, ASSIGNOR T0 CHAIN BELT COMPANY, 0F MILWAUKEE, WISCONSIN, A CORPORATION 0F WlISONN.

WATER-SUPPLY SYSTEM AND VALVE THERFFOR.

Application filed October 25, 1926. Serial IST-o. 144,028. i

paratively inexpensive to manufacture and install and more efficient 1n use than these which have been heretofore proposed.

.ift further objectof the invention is to provide a water supply system 'for concrete mixers which are located at considerable distances from the source of water supply and which according to common practice are connected therewith by comparatively long pipe lines, wherein provision is made to cushion the waterwhen it is cut oft' by the valve, to the end that the knocking or so called water hammer, common to such systems may be eliminated.

With the above and other objects in view which will appear as the description proceeds the invention consists inthe novel de- -v tails of construction and combinations of parts more fully hereinafter described and particularly pointed out in the appended claims.

Referring to the accompanying drawings forming a part of this specification in which like reference characters designate like parts invr all the views:

Figure 1 is a side elevational view of a pressure actuated balanced valve constructcd in accordance with the present invention, together with its pilot valve and connecting piping as applied `to the water receivin tank or receptacle of one form of the wel known concrete mixer; I A to Fig. 2 is an end elevational view of the valve and associated parts shown in-Fig. 1;

Fig. 3 is an enlarged central vertical sect-ional view ot .the master valve taken approximately on the plane indicated by the line Hit-lll of Fig-2;'

. Fig. 4 is a top plan viewo't the master valve with the connections omitted;

Fig. 5 is`a "transverse sectional view taken approximately `on the plane indicated by the line V--V 'of Fig. 3;

Fig., 6 is a detailseetional elevational view ot a slightly modified term et the invention showing an air cushioning chamber associated with the pilot valve;

te Fig.. 7 is a view similar to Fig. 6 showing a further slightly modified form of the invention wherein the cushioning chamber is provided with a spring pressed piston for assisting .in the functioning et the master valve; Y 60 Fig. 8 is a central vertical sectional View similar to Fig. 3 ol' a somewhat moditied form of the master valve in which the cushioning air chamber and thepilotvalve are inprporated into the master valve structure; an

9 is a transverse sectional view taken approximately on the plane indicated bythe line IX-IX of Fig. 8.

Referring more particularly to Figs. 1 to 70 5 inclusive, the numeral 15 indicates a water receivingtank orl receptacle such for eX-. ample, as the usual receptacle ot a concrete' mixer adjacent which is mounted the master water. controlling valve 16. This valve` as will be clear from Fig. 3 comprises a casing or body 17 which-is provided with an inlet port' 18, an outlet port 19 substantially diametrically opposite the port 18 and a -second outlet port 20 adjacent to the po1tl8. B

The inlet port 18 is connected by means of a pipe 21 with any suitable source of water supply while the port 19 may be connected as by an elbow or pipe 22 with the tank or receptacle 15 and the port 20 is connected 85 by means of a pipe 23 with the mixing drum of the concrete mixer. y

As above indicated the master or control valve is of the pressure operated balance type wherein thevalve heads are moved to and from their seats by pistons which are actuated bythe pressure of the water which may be taken from the supply line. To this end the valve body 17 is bored axially to.- provide a pair of cylinders 24 and 25 in 95` which the actuating pistons are adapted to slide. The piston in the cylinder.` v24 as shown in Fig. 3, coniprises a pair of spaced heads or disks 26 and 27 between which is mountedv a pair of cupped washers or pack- 10U ing members 28, The said heads 26 and 27 are mounted upon an axially extending piston rod 29 which carries at its other end a pair .of heads 30 and 31 between which is clamped a cupped packingA or washer mernloo ber 32.

The piston rod 29 also carries intermediate the actuating pistons, a spool 83 provided with the end danges Bl- `and 35 which carry .respectively the valve heads or pacliings 36 11o wall 40'thereby` dividing the said casing into sired.

and 37 which abut the piston heads 27 and any water whichwas previously in the cyl- 31 respectively, aswill be clear from Fig. 3. inder 24 behind the piston head 26 has These said valve packings 36 and 37 are been forced out through the passage 47, adapted toiseat alternatelyagainst the seats pipe 49 and through the pilot valve plug to 38 and 39 provided upon an interior annular the pipe 54 fromvx'vhich it has been diswall or flange 40 with which the valve body charged into the chamber 43, and has passed 17 is provided whereby the flow of wateri through the outlet pipe 23 to the mixer. The from the port 18 to the port 19 and from the quantity of. water necessary to actuate the port 19 to the port 20 may be controlled, as valve is quite small and not sulicient to diswill appear-more fully below.` A transverse turl) to any appreciable extent, themeasured wall 41 is provided between the outerwall quantity which will be fed to the `mixer if ot the valve casing and the inner annular an automatic controlis employed.

lith the parts of the master valve in the chambers 42 and 43 and preventing'the flow positions shown in Fig.v 3, water from the of water directly fromthe inlet port 18 to supply pipe 21 will pass into the chamber the outlet port 20. The endsl of 'the .valve 42- and due to the fact that the valve 36 bodyk 17 are closed by the` end members45` is open,..Wi-ll.passfrom the said chamber i11- and 46 which are provided with the pas-` 'to the intermediate chamber 61 within the sages 47 and 48 respectively vwhich com-gigannular flange 40 and 'thence through the municate'by means of pipes 49 and 50 withl;po1t 19 and connection 22 into the receiver a four Way pilot .valve 51, `(see Figs. 1 and 15. lll/*heu suilicient water has been thus 2.).\ Additional' pipes 53 `and 54 lead repassed to the receptacle 15, upon actuation.

spectively from the'chambers '42 and 43 of of the link 60, eit

1er manually or by alitothe valve body 17 to the pilot valve 51, and 1natic1means,to swing the valve lever 59 to- 'serve asi-supply and exhaust pipfes for the ward the right or in la counter clockwise ditluid pressureto andromthe-pistons. `The ree'tion. as viewedin Fig. 1, lwhereby the end members and 46 may be further propilot -valve plug will'V oscillated to estabvided with passages and 56 which are lish communication between the pipes 53 and closed by drain plugs 57 and 58 whereby the 49 and between the pipes 50 and 54, the water cylinders 24 and 25 may be drained as def A from the piston head 30 to the piston head 26,

The pilot valve 51 may comprise any of while the cylinder 25 will be placed in comthe well known forms of four way valves, munication witl'the exhaust pipev 54 wherebeing here ishown for illustrative purposes, by the piston rod 29 and the parts carried ascomprising aA valve of the rotary plug thereby will be moved toward the right as `type. The plug thereof is lprovided with an viewed in Fig. 3, to seat the valve 36 and operating lever 59 to which is connected a unseat the valve 37. It therefore, results rod or linkG() by means of which the Valve that the water which has been introduced plug may be oscillated through an angle of into the receptacle15will now be permitted substantially 90 either .manually or by anto iow back through the connection 22 and automaticmeans not showmif it is desired port 19 into the chamber 61 from which it to automatically control'the amount of water will pass into the chamber 43 and thence pressure from the pipe 53 will be transferred introduced into the receptacle 15.`

vThe operation of the'device as thus far disclosed is as follows:

` lVith t-he parts in the positions illustrated through the pipe 23 to the mixing drum.

As was above stated, where the concrete mixer is being employed at-a considerable distance from the source of water supply i in Figs. l, 2 and 3, the plug of the pilot valve and connected thereto by a relatively long 51 isinv such a position as toestablish oompipe line, as for example, in paving work, munication between the pipes 53 and 50 and it has been found that upon the cutting olf also between the pipes 49 and 54' which will of the water pressure through the Voperation produce the conditions in the master valve of the master valve that the knocking comi-ndicated in Fig.` 3, with-the valve packing monlyknown as the water hammer, pro- ,37 seated against the seat 39 and the valve duces very injurious effects upon the pipes packing'36 unseated-rom its seat 38. This and Valves. In order to eliminate this obposition of the valve results from the fact jection, there` is shown in Fig. G, a slightly that water under pressure-from the supply modiiied'form ofthe invention in which pipe 21 has passed through the chamber 42 Kthere is interposedbetween the pipe 53 and and pipe 53 to the pilot valve 51 from whence the pilot valve 51, a cushioning air chamber it has been conducted through the pipe 50 65. The inlet to this chamber from the pipe and passage 48 toA the cylinder 25, exerting 53 is controlled by a Lball check valve diaa pressure upon the piston head 30 wheregrammatically illustrated at G6, which perby the said i'ston together with its associmits waterto flow from the pipe 53 into the ated piston rods and valve has been moved chamber and prevents. any reverse flow or toward the left as viewed in Fig. 3 to the pressure into the pipe 53. As will be readpositions shown therein. In the meantime ily understood the air trapped in the cham- .v amasar ber b serves to cushion the water pressure y from the pipe 53 when the tlow is suddenly cutotll throught-he operation ot the valves and thereby tends to eliminate the knocking or water hammer.,

ln thetorm of the Vinvention illustrated in liig. 7, the cushioning chamber is pro- A vided with a piston (57 carried by a piston rod 68 and normally urged downwardly as viewed in the said ligure, by means of compression springs G9. only serves to eliminatethe water hammer but it also assists in throwing the'master valve pistons from one position to the other as the water pressure is released by the pilot valve 51. Y

g ze

ln Figs. 8 and 9, there is shown a -further inodiiied :torni of the invention wherein the master valve is combined with the cushioning chamber and the pilot valve into a single unitary structure. As will be clear from 'lli1 ig. 8, this is laccomplished by modifying one ot-the end members ot the valve body, here shown as member 46, whereby the cushioning chamber 65 1s formed as an integral 'part of the said member, as is' also Ythe housing` or casing of the pilot valve 51. rlhe operation of this formbf the d-evice howeveiyremains the same as that previpusly described and need not be repeated 1ere.

Wh ile several forms of the invention have been illustrated and described, it is obvious that those skilled in the art may vary the Y details of construction 'as wellas the precise `arrangement of Aparts without departing from the spirit ol the invention and theredore, it is not wished to be limited to the i te let chamber; connections4 for admittingr fluid' above disclosure, except as may be required by the claims.

What isclaimed is:

1. lin a valve of the class described, 4a valve body provided with an inlet chamber, an outlet chamber, an intermediate chamber, and a pair of cylinders; a piston mounted in each' of said cylinders; a valve member associated' with each of said pistons for controlling the flow of. fluid from said'inletV chamber to said intermediate chamber, and

from said intermediate chamber to said outirom said inlet chamber to said cylinders; connections for exhausting` said cylinders to said outlet chamber; and means for crossconnecting,V said connections.

2. ln a valve of the class described, a valve body provided witha pair .of cylinders, an inlet chamber, an outlet chamber,

, `and an interior spaced wall forming an in- The construction not the class described7 a A valve body provided with an inlet" port, an

outlet port, an intermediate chamber inV communication withbotlroif said ports, and a pair of cylinders, said intermediate chamber .ha-ving a third port leading therefrom; a piston mounted in each of said cylinders; a valve member associated'with each oit' said pistons for controllinr comm unication re spectively between saic .inlet port and said chamber, .and said Voutlet port' and said chamber, said 'valve members in one position passing fluid from said inlet port throughsaid chamber to said third port, and in 'their other position passing fluid from said third port through said chamber to said outlet-v port; means for admitting Huid from said inlet p ort to said cylinders; and/means :tor ezdlausting- Huid from said cylinders to said outlet port.

Ll. In a water supply system for concrete 1nixers,va supply pipe;` a receiving receptacle; alnaster valve for controlling the flow of water from said pipe to said receptacle; a pilot valve for controlling said master valve; and a cushioning chamber interposed between said supply .pipe and said pilotvalve, adapted to assist'in moving said master valve from one position to another.

5. In a valvefor water supply systems of the class described, a valve body; an end member closing one end of said body, said member being provided With'an extension; a pilot valve housed in said extension; and a cushioning chamber -formed integrally with said. extension witha cylinder; an end member closing one end of said cylinder and having an extension provid with a passage l'commun-ieating ,ico

6.111 a'valve 'for water supply systemsv of i lthe class described,a valve body provided withsaidy cylinder; apilot valvexnounted in said extension, controlling the ow of Huid to said passage and cylinder; and an air cushioning;- chamber formed integral withv said extension.

eine o. HAMREN. 

